Diagnosis of Post-traumatic Stress Disorder (PTSD)

PTSD
is categorized according to when symptoms occur and how long they last. There are three types of PTSD:

Acute—symptoms last between 1-3 months after the event

Chronic—symptoms last more than three months after the event

Delayed onset—symptoms don’t appear until at least six months after the event

Diagnosis of PTSD is usually based on the following:

Initial Assessment

Your doctor will ask you about your symptoms and medical history. This could be done by a structured interview and/or questionnaire. You will be given a psychological assessment and asked about past trauma. PTSD will be diagnosed if you have the specified symptoms, they last for more than one month, and they result in both emotional distress and disturbed functioning (problems at school, work, and/or in family and peer relationships).

Diagnosis is often based on the criteria outlined in the American Psychiatric Association’s
Diagnostic and Statistical Manual of Mental Disorders
(DSM-IV), which include the following:

Exposure to a traumatic event

Recurrent and intrusive distressing memories of the event

Repeated vivid and uncontrollable memories

Emotional numbness

Physical symptoms of fear triggered by cues in the environment or other physical sensations that dredge up the traumatic event

Interference with work, school, and/or relationships

Evaluation for Substance Abuse

Using and withdrawing from addictive substances can cause
anxiety
and other symptoms that resemble PTSD. Your doctor may ask about your use of alcohol and other drugs.

Evaluation of Other Psychiatric Disorders

Other psychiatric disorders often occur with PTSD. You may be tested for other psychiatric disorders, such as: